121539875 has 8 divisors (see below), whose sum is σ = 151681920. Its totient is φ = 97231800.

The previous prime is 121539839. The next prime is 121539881. The reversal of 121539875 is 578935121.

It is not a de Polignac number, because 121539875 - 2¹⁴ = 121523491 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 486035 + ... + 486284.

It is an arithmetic number, because the mean of its divisors is an integer number (18960240).

Almost surely, 2^121539875 is an apocalyptic number.

121539875 is a deficient number, since it is larger than the sum of its proper divisors (30142045).

121539875 is an frugal number, since it uses more digits than its factorization.

121539875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972334 (or 972324 counting only the distinct ones).

The product of its digits is 75600, while the sum is 41.

The square root of 121539875 is about 11024.5124608755. The cubic root of 121539875 is about 495.3432642676.

The spelling of 121539875 in words is "one hundred twenty-one million, five hundred thirty-nine thousand, eight hundred seventy-five".